Potential fix for code scanning alert no. 3: Workflow does not contain permissions (#338)

Signed-off-by: Kurt Garloff <kurt@garloff.de>
Co-authored-by: Copilot Autofix powered by AI <62310815+github-advanced-security[bot]@users.noreply.github.com>

Author: garloff

.github/workflows/build_and_staging.yml

@@ -8,6 +8,8 @@ on:
 
 jobs:
   build_and_staging:
+    permissions:
+      contents: write
     runs-on: ubuntu-latest
     steps:
       - name: Checkout Repository